[Intel-wired-lan] [PATCH iwl-next] iavf: flower: validate control flags

[Intel-wired-lan] [PATCH iwl-next] iavf: flower: validate control flags

[Asbjørn Sloth Tønnesen]

This driver currently doesn't support any control flags.

Use flow_rule_has_control_flags() to check for control flags,
such as can be set through `tc flower ... ip_flags frag`.

In case any control flags are masked, flow_rule_has_control_flags()
sets a NL extended error message, and we return -EOPNOTSUPP.

Only compile-tested.

Signed-off-by: Asbjørn Sloth Tønnesen <ast@fiberby.net>
---
 drivers/net/ethernet/intel/iavf/iavf_main.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/ethernet/intel/iavf/iavf_main.c b/drivers/net/ethernet/intel/iavf/iavf_main.c
index 13361a780ece..f14355d52f47 100644
--- a/drivers/net/ethernet/intel/iavf/iavf_main.c
+++ b/drivers/net/ethernet/intel/iavf/iavf_main.c
@@ -3757,6 +3757,10 @@ static int iavf_parse_cls_flower(struct iavf_adapter *adapter,
 
 		flow_rule_match_control(rule, &match);
 		addr_type = match.key->addr_type;
+
+		if (flow_rule_has_control_flags(match.mask->flags,
+						f->common.extack))
+			return -EOPNOTSUPP;
 	}
 
 	if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) {
-- 
2.43.0

Re: [Intel-wired-lan] [PATCH iwl-next] iavf: flower: validate control flags

[Simon Horman]

On Tue, Apr 16, 2024 at 02:43:25PM +0000, Asbjørn Sloth Tønnesen wrote:
> This driver currently doesn't support any control flags.
> 
> Use flow_rule_has_control_flags() to check for control flags,
> such as can be set through `tc flower ... ip_flags frag`.
> 
> In case any control flags are masked, flow_rule_has_control_flags()
> sets a NL extended error message, and we return -EOPNOTSUPP.
> 
> Only compile-tested.
> 
> Signed-off-by: Asbjørn Sloth Tønnesen <ast@fiberby.net>

Reviewed-by: Simon Horman <horms@kernel.org>

Re: [Intel-wired-lan] [PATCH iwl-next] iavf: flower: validate control flags

[Buvaneswaran, Sujai]

Hi Asbjørn,

HW offload is not directly supported on the iavf VF interface. VF traffic can be offloaded only through VF port representor device which uses ice driver.

[root@cbl-mariner ~]# ethtool -i ens5f0v0
driver: iavf
version: 6.9.0-rc5+
firmware-version: N/A
expansion-rom-version: 
bus-info: 0000:b1:01.0
supports-statistics: yes
supports-test: no
supports-eeprom-access: no
supports-register-dump: no
supports-priv-flags: no
[root@cbl-mariner ~]# tc qdisc add dev ens5f0v0 ingress
[root@cbl-mariner ~]# tc filter add dev ens5f0v0 ingress protocol ip flower skip_sw ip_flags frag/firstfrag action drop
Error: TC offload is disabled on net device.
We have an error talking to the kernel
[root@cbl-mariner ~]# tc filter add dev ens5f0v0 ingress protocol ip flower ip_flags frag/firstfrag action drop
[root@cbl-mariner ~]# tc filter show dev ens5f0v0 ingress
filter protocol ip pref 49152 flower chain 0 
filter protocol ip pref 49152 flower chain 0 handle 0x1 
  eth_type ipv4
  ip_flags frag/firstfrag
  not_in_hw
        action order 1: gact action drop
         random type none pass val 0
         index 1 ref 1 bind 1

Regards,
Sujai B

> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@osuosl.org> On Behalf Of
> Asbjørn Sloth Tønnesen
> Sent: Tuesday, April 16, 2024 8:13 PM
> To: intel-wired-lan@lists.osuosl.org
> Cc: netdev@vger.kernel.org; linux-kernel@vger.kernel.org; Eric Dumazet
> <edumazet@google.com>; Nguyen, Anthony L
> <anthony.l.nguyen@intel.com>; Asbjørn Sloth Tønnesen <ast@fiberby.net>;
> Jakub Kicinski <kuba@kernel.org>; Paolo Abeni <pabeni@redhat.com>;
> David S. Miller <davem@davemloft.net>
> Subject: [Intel-wired-lan] [PATCH iwl-next] iavf: flower: validate control flags
> 
> This driver currently doesn't support any control flags.
> 
> Use flow_rule_has_control_flags() to check for control flags, such as can be
> set through `tc flower ... ip_flags frag`.
> 
> In case any control flags are masked, flow_rule_has_control_flags() sets a NL
> extended error message, and we return -EOPNOTSUPP.
> 
> Only compile-tested.
> 
> Signed-off-by: Asbjørn Sloth Tønnesen <ast@fiberby.net>
> ---
>  drivers/net/ethernet/intel/iavf/iavf_main.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/drivers/net/ethernet/intel/iavf/iavf_main.c
> b/drivers/net/ethernet/intel/iavf/iavf_main.c
> index 13361a780ece..f14355d52f47 100644
> --- a/drivers/net/ethernet/intel/iavf/iavf_main.c
> +++ b/drivers/net/ethernet/intel/iavf/iavf_main.c
> @@ -3757,6 +3757,10 @@ static int iavf_parse_cls_flower(struct
> iavf_adapter *adapter,
> 
>  		flow_rule_match_control(rule, &match);
>  		addr_type = match.key->addr_type;
> +
> +		if (flow_rule_has_control_flags(match.mask->flags,
> +						f->common.extack))
> +			return -EOPNOTSUPP;
>  	}
> 
>  	if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) {
> --
> 2.43.0

Re: [Intel-wired-lan] [PATCH iwl-next] iavf: flower: validate control flags

[Asbjørn Sloth Tønnesen]

Hi Sujai,

Thank you for testing.

On 5/6/24 5:30 AM, Buvaneswaran, Sujai wrote:
> HW offload is not directly supported on the iavf VF interface. VF traffic can be offloaded only through VF port representor device which uses ice driver.

Again, there is a awful lot of flower code in iavf_main.c, if it's not supported.

Try with:
ethtool -K $iface hw-tc-offload on
tc qdisc add dev $iface ingress
tc filter add dev $iface protocol ip parent ffff: prio 1 flower dst_mac 3c:fd:fe:a0:d6:70 ip_flags frag skip_sw hw_tc 1

-- 
Best regards
Asbjørn Sloth Tønnesen
Network Engineer
Fiberby - AS42541

Re: [Intel-wired-lan] [PATCH iwl-next] iavf: flower: validate control flags

[Buvaneswaran, Sujai]

Hi Asbjørn,

I have tried the above steps as well and still issue is seen while enabling HW offload on iavf interface.

[root@cbl-mariner ~]# ethtool -K ens5f0v0 hw-tc-offload on
Actual changes:
hw-tc-offload: off [requested on]
Could not change any device features
[root@cbl-mariner ~]# tc qdisc add dev ens5f0v0 ingress
[root@cbl-mariner ~]# tc filter add dev ens5f0v0 protocol ip parent ffff: prio 1 flower dst_mac 3c:fd:fe:a0:d6:70 ip_flags frag skip_sw hw_tc 1
Error: TC offload is disabled on net device.
We have an error talking to the kernel

Thanks,
Sujai B

> -----Original Message-----
> From: Asbjørn Sloth Tønnesen <ast@fiberby.net>
> Sent: Monday, May 6, 2024 2:50 PM
> To: Buvaneswaran, Sujai <sujai.buvaneswaran@intel.com>; intel-wired-
> lan@lists.osuosl.org
> Cc: netdev@vger.kernel.org; linux-kernel@vger.kernel.org; Eric Dumazet
> <edumazet@google.com>; Nguyen, Anthony L
> <anthony.l.nguyen@intel.com>; Jakub Kicinski <kuba@kernel.org>; Paolo
> Abeni <pabeni@redhat.com>; David S. Miller <davem@davemloft.net>
> Subject: Re: [Intel-wired-lan] [PATCH iwl-next] iavf: flower: validate control
> flags
> 
> Hi Sujai,
> 
> Thank you for testing.
> 
> On 5/6/24 5:30 AM, Buvaneswaran, Sujai wrote:
> > HW offload is not directly supported on the iavf VF interface. VF traffic can
> be offloaded only through VF port representor device which uses ice driver.
> 
> Again, there is a awful lot of flower code in iavf_main.c, if it's not supported.
> 
> Try with:
> ethtool -K $iface hw-tc-offload on
> tc qdisc add dev $iface ingress
> tc filter add dev $iface protocol ip parent ffff: prio 1 flower dst_mac
> 3c:fd:fe:a0:d6:70 ip_flags frag skip_sw hw_tc 1
> 
> --
> Best regards
> Asbjørn Sloth Tønnesen
> Network Engineer
> Fiberby - AS42541

Re: [Intel-wired-lan] [PATCH iwl-next] iavf: flower: validate control flags

[Buvaneswaran, Sujai]

I have tested this patch from ADQ perspective and it is working fine.

[root@BP-node3-BINDU ~]# tc filter add dev ens801f0v0 protocol ip parent ffff: prio 1 flower dst_ip 192.168.1.10 ip_proto tcp dst_port 12000 ip_flags frag skip_sw hw_tc 1
RTNETLINK answers: Operation not supported
We have an error talking to the kernel
[root@BP-node3-BINDU ~]# tc filter add dev ens801f0v0 protocol ip parent ffff: prio 1 flower dst_ip 192.168.1.10 ip_proto tcp dst_port 12000 ip_flags frag/firstfrag  skip_sw hw_tc 1
RTNETLINK answers: Operation not supported
We have an error talking to the kernel
[root@BP-node3-BINDU ~]# tc filter add dev ens801f0v0 protocol ip parent ffff: prio 1 flower dst_ip 192.168.1.10 ip_proto tcp dst_port 12000 skip_sw hw_tc 1
[root@BP-node3-BINDU ~]# tc filter show dev ens801f0v0 root
filter parent ffff: protocol ip pref 1 flower chain 0 
filter parent ffff: protocol ip pref 1 flower chain 0 handle 0x1 hw_tc 1 
  eth_type ipv4
  ip_proto tcp
  dst_ip 192.168.1.10
  dst_port 12000
  skip_sw
  in_hw in_hw_count 1
[root@BP-node3-BINDU ~]# tc filter add dev ens801f0v0 protocol ip parent ffff: prio 1 flower dst_ip 192.168.1.10 ip_proto tcp dst_port 12000 ip_flags frag/firstfrag hw_tc 1
[root@BP-node3-BINDU ~]# tc filter show dev ens801f0v0 root
filter parent ffff: protocol ip pref 1 flower chain 0 
filter parent ffff: protocol ip pref 1 flower chain 0 handle 0x1 hw_tc 1 
  eth_type ipv4
  ip_proto tcp
  dst_ip 192.168.1.10
  dst_port 12000
  skip_sw
  in_hw in_hw_count 1
filter parent ffff: protocol ip pref 1 flower chain 0 handle 0x2 hw_tc 1 
  eth_type ipv4
  ip_proto tcp
  dst_ip 192.168.1.10
  dst_port 12000
  ip_flags frag/firstfrag
  not_in_hw

Thanks,
Sujai B

> -----Original Message-----
> From: Buvaneswaran, Sujai
> Sent: Monday, May 6, 2024 3:03 PM
> To: Asbjørn Sloth Tønnesen <ast@fiberby.net>; intel-wired-
> lan@lists.osuosl.org
> Cc: netdev@vger.kernel.org; linux-kernel@vger.kernel.org; Eric Dumazet
> <edumazet@google.com>; Nguyen, Anthony L
> <anthony.l.nguyen@intel.com>; Jakub Kicinski <kuba@kernel.org>; Paolo
> Abeni <pabeni@redhat.com>; David S. Miller <davem@davemloft.net>
> Subject: RE: [Intel-wired-lan] [PATCH iwl-next] iavf: flower: validate control
> flags
> 
> Hi Asbjørn,
> 
> I have tried the above steps as well and still issue is seen while enabling HW
> offload on iavf interface.
> 
> [root@cbl-mariner ~]# ethtool -K ens5f0v0 hw-tc-offload on Actual changes:
> hw-tc-offload: off [requested on]
> Could not change any device features
> [root@cbl-mariner ~]# tc qdisc add dev ens5f0v0 ingress [root@cbl-mariner
> ~]# tc filter add dev ens5f0v0 protocol ip parent ffff: prio 1 flower dst_mac
> 3c:fd:fe:a0:d6:70 ip_flags frag skip_sw hw_tc 1
> Error: TC offload is disabled on net device.
> We have an error talking to the kernel
> 
> Thanks,
> Sujai B
> 
> > -----Original Message-----
> > From: Asbjørn Sloth Tønnesen <ast@fiberby.net>
> > Sent: Monday, May 6, 2024 2:50 PM
> > To: Buvaneswaran, Sujai <sujai.buvaneswaran@intel.com>; intel-wired-
> > lan@lists.osuosl.org
> > Cc: netdev@vger.kernel.org; linux-kernel@vger.kernel.org; Eric Dumazet
> > <edumazet@google.com>; Nguyen, Anthony L
> <anthony.l.nguyen@intel.com>;
> > Jakub Kicinski <kuba@kernel.org>; Paolo Abeni <pabeni@redhat.com>;
> > David S. Miller <davem@davemloft.net>
> > Subject: Re: [Intel-wired-lan] [PATCH iwl-next] iavf: flower: validate
> > control flags
> >
> > Hi Sujai,
> >
> > Thank you for testing.
> >
> > On 5/6/24 5:30 AM, Buvaneswaran, Sujai wrote:
> > > HW offload is not directly supported on the iavf VF interface. VF
> > > traffic can
> > be offloaded only through VF port representor device which uses ice driver.
> >
> > Again, there is a awful lot of flower code in iavf_main.c, if it's not
> supported.
> >
> > Try with:
> > ethtool -K $iface hw-tc-offload on
> > tc qdisc add dev $iface ingress
> > tc filter add dev $iface protocol ip parent ffff: prio 1 flower
> > dst_mac
> > 3c:fd:fe:a0:d6:70 ip_flags frag skip_sw hw_tc 1
> >
> > --
> > Best regards
> > Asbjørn Sloth Tønnesen
> > Network Engineer
> > Fiberby - AS42541

Re: [Intel-wired-lan] [PATCH iwl-next] iavf: flower: validate control flags

[Buvaneswaran, Sujai]

> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@osuosl.org> On Behalf Of
> Asbjørn Sloth Tønnesen
> Sent: Tuesday, April 16, 2024 8:13 PM
> To: intel-wired-lan@lists.osuosl.org
> Cc: netdev@vger.kernel.org; linux-kernel@vger.kernel.org; Eric Dumazet
> <edumazet@google.com>; Nguyen, Anthony L
> <anthony.l.nguyen@intel.com>; Asbjørn Sloth Tønnesen <ast@fiberby.net>;
> Jakub Kicinski <kuba@kernel.org>; Paolo Abeni <pabeni@redhat.com>;
> David S. Miller <davem@davemloft.net>
> Subject: [Intel-wired-lan] [PATCH iwl-next] iavf: flower: validate control flags
> 
> This driver currently doesn't support any control flags.
> 
> Use flow_rule_has_control_flags() to check for control flags, such as can be
> set through `tc flower ... ip_flags frag`.
> 
> In case any control flags are masked, flow_rule_has_control_flags() sets a NL
> extended error message, and we return -EOPNOTSUPP.
> 
> Only compile-tested.
> 
> Signed-off-by: Asbjørn Sloth Tønnesen <ast@fiberby.net>
> ---
>  drivers/net/ethernet/intel/iavf/iavf_main.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
Tested-by: Sujai Buvaneswaran <sujai.buvaneswaran@intel.com>